Color imaging using color led array as color light-field image sensor

A color light field sensor, comprising:

• a light receiver for receiving light from a light field, the received light comprising color composition and amplitude distribution;
• at least three LEDs of differing emission colors operable to absorb at least a portion of the received light and to create respectively associated light amplitude measurement signals, the emission colors comprising a lowest-value wavelength, a highest-value wavelength, and at least one mid-value wavelength having wavelength-value between the lowest-value wavelength and the highest-value wavelength;
• and
• a processing unit for:
• producing a first output signal by subtracting a first function of the light amplitude measurement signal associated with the mid-value wavelength LED from a function of the light amplitude measurement signal associated with the lowest-value wavelength LED;
• producing a second output signal by subtracting a second function of the light amplitude measurement signal associated with the highest-value wavelength LED from a function of the light amplitude measurement signal associated with the mid-value wavelength LED;
• and
• producing a third output by taking a third function of the light amplitude measurement signal associated with the highest-value wavelength LED,
• wherein the first output signal, second output signal, and third output signal are responsive to the color composition and amplitude distribution of received light.

A display device having a color light field sensor capability, comprising:

• an array of LEDs;
• a control logic operable to drive the array of LEDs;
• a light receiver for receiving light from a light field, the received light comprising color composition and amplitude distribution,
• wherein the array of LED comprises at least three LEDs of differing emission colors operable to absorb at least a portion of the received light and to create respectively associated light amplitude measurement signals, the emission colors comprising a lowest-value wavelength, a highest-value wavelength, and at least one mid-value wavelength having wavelength-value between the lowest-value wavelength and the highest-value wavelength;
• and
• a processing unit for:
• producing a first output signal by subtracting a first function of the light amplitude measurement signal associated with the mid-value wavelength LED from a function of the light amplitude measurement signal associated with the lowest-value wavelength LED;
• producing a second output signal by subtracting a second function of the light amplitude measurement signal associated with the highest-value wavelength LED from a function of the light amplitude measurement signal associated with the mid-value wavelength LED;
• and
• producing a third output by taking a third function of the light amplitude measurement signal associated with the highest-value wavelength LED,
• wherein the first output signal, second output signal, and third output signal are responsive to the color composition and amplitude distribution of received light.